Boot upper



FIG. 1 is a perspective view of a boot upper according to my new design;

FIG. 2 is a right side elevational view thereof, the left side elevational view being a mirror image thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is an enlarged view of one of the ornaments removed from the boot for clarity of illustration.

The dashed lines in FIGS. 1 to 5 illustrate stitching and form a part of the claimed design.

The phantom lines in FIGS. 1 to 5 illustrate environment and form no part of the claimed design. 

The ornamental design for a boot upper, as shown and described. 